Alex Reynolds is the founder and CEO of ATTX, where he leads the company’s mission to democratize access to space through reusable, flight-proven software platforms. As the visionary behind ATTX’s cFS++ embedded software and ModelSpace simulation tools, Alex has driven their successful adoption across a wide range of missions—from launch vehicle flight software to cutting-edge cislunar GN&C and mission analysis.

Alex also serves as the Principal Investigator for Deep Sight, ATTX’s flagship orbital situational awareness program, where he oversees all technical and schedule execution. He combines hands-on engineering expertise with a deep understanding of orbital mechanics, simulation, and autonomy to push the boundaries of what's possible in space traffic management.

Prior to founding ATTX, Alex led the Flight Dynamics Modeling and Simulation (FDMS) team at Sierra Space, developing the high-fidelity flight simulation for the Dream Chaser spaceplane. In that role, he managed a 20-person engineering team and worked closely with NASA's Johnson Space Center to coordinate ISS rendezvous operations and manage conjunction avoidance during real-time flight control.

Earlier in his career, Alex served as Chief Engineer of the AFRL-funded MR and MRS SAT microsatellite mission, pioneering novel techniques in relative navigation and on-orbit proximity operations using computer vision. His research and hands-on development of flight computers and avionics hardware have laid the groundwork for multiple spaceflight innovations.

Alex is a frequent speaker on autonomy, simulation, and space systems, including a featured appearance on The Casual Space Podcast with Beth Mund.

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